I’m running the latest version of Quick Cache Lite, with the two relevant options:
* Caching Enabled for GET (Query String) Requests? No, do NOT cache..
* Caching Enabled for RSS, RDF, Atom Feeds? No, do NOT cache…

But when I check the cache files (in wp-content/cache) I can see versions with query strings are also cached:

Thanks so much for the bug report! That definitely should not be happening.

Lots have things have changed in the upcoming release, including how cache files are stored (cache files no longer look cryptic but rather follow a natural orter like 2014/04/18/intel-announces-its-first-bay-trail-fanless-nuc-kit.html).

Would you be interested in testing the latest development copy of Quick Cache to see if this bug still exists? In my tests it seems fine, but I’d love to get a second confirmation that this bug doesn’t still exist:

A “.q” directory is created with a cache for the RSS feed link.
Same settings as before in Quick Cache Lite:
* Caching Enabled for GET (Query String) Requests? No, do NOT cache..
* Caching Enabled for RSS, RDF, Atom Feeds? No, do NOT cache…